Dynamical collapse of charged scalar field in phantom gravity

Nakonieczna, Anna; Rogatko, Marek; Moderski, R.

doi:10.1103/physrevd.86.044043

Cited by 41 publications

(41 citation statements)

References 47 publications

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“…Recently, Bronnikov et al [64] obtained a kind of solutions with phantom scalar hair, which has the properties of both black holes and wormholes. Some other black hole solutions describing gravity coupled to phantom scalar fields or phantom Maxwell fields have been found and the corresponding geometric structure and thermodynamic properties are also studied in [65][66][67][68][69][70][71][72][73]. The strong gravitational lensing of such a kind of black holes with phantom hair has been investigated in [74][75][76][77][78].…”

Section: Introductionmentioning

confidence: 99%

Double shadow of a regular phantom black hole as photons couple to the Weyl tensor

2016

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We have studied the shadow of a regular phantom black hole as photons couple to the Weyl tensor. We find that due to the coupling photons with different polarization directions propagate along different paths in the spacetime so that there exists a double shadow for a black hole, which is quite different from that in the non-coupling case where only a single shadow emerges. The overlap region of the double shadow, the umbra, of the black hole increases with the phantom charge and decreases with the coupling strength. The dependence of the penumbra on the phantom charge and the coupling strength is converse to that of the umbra. Combining with the supermassive central object in our Galaxy, we estimated the shadow of the black hole as the photons couple to the Weyl tensor. Our results show that the coupling brings about richer behaviors of the propagation of coupled photon and the shadow of the black hole in the regular phantom black hole spacetime.

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Section: Introductionmentioning

confidence: 99%

Double shadow of a regular phantom black hole as photons couple to the Weyl tensor

2016

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“…We studied dynamical evolution of the phantom scalar perturbation in the Schwarzschild black hole spacetime and found that the phantom scalar perturbation grows with an exponential rate in the late-time evolution, which differs from the decay of the usual scalar perturbations in the background of a black hole [16][17][18]. Moreover, some black hole solutions describing gravity coupled to phantom scalar fields or phantom Maxwell fields have been found and the corresponding geometric structure and thermodynamic properties are also studied in [19][20][21][22][23][24][25][26][27][28]. The strong gravitational lensing of such kind of black hole with phantom hair has been investigated in [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Testing gravity of a regular and slowly rotating phantom black hole by quasi-periodic oscillations

Chen¹,

Wang²,

Jing³

2016

Class. Quantum Grav.

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We extend firstly the regular phantom black hole solution to a slowly rotating black hole case and find that the phantom field depresses the angular velocity of the event horizon and suppresses the super-radiation of black hole. We also probe the dependence of quasi-periodic oscillations frequencies in relativistic precession model on the phantom parameter. With the observation data of GRO J1655-40, we make a constraint on the parameters of the regular and slowly rotating phantom black hole. Our results show that although the best-fit value of the phantom parameter b is small, the allowed value of b in the 1σ region is b < 0.619, which means that the phantom theoretical model can not be excluded by the constraint from quasi-periodic oscillations with the observation data of GRO J1655-40.

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“…In this solution the charged term in the metric has an opposite sign with respect to the corresponding term of the standard Reissner Nordström black hole. Other works in the field of theories with phantom dilaton and phantom Maxwell field have considered gravitational collapse of a charged scalar field [15] and also light paths in black-hole spacetims [16].…”

Section: Introductionmentioning

confidence: 99%

Gravitational lensing by phantom black holes

Gyulchev

Stefanov

2013

Phys. Rev. D

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In some models dark energy is described by phantom scalar fields (scalar fields with "wrong" sign of the kinetic term in the lagrangian). In the current paper we study the effect of phantom scalar field and/or phantom electromagnetic field on gravitational lensing by black holes in the strong deflection regime. The black-hole solutions that we have studied have been obtained in the frame of the Einstein-(anti-)Maxwell-(anti-)dilaton theory. The numerical analysis shows considerable effect of the phantom scalar and electromagnetic fields on the angular position, brightness and separation of the relativistic images.

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Dynamical collapse of charged scalar field in phantom gravity

Cited by 41 publications

References 47 publications

Double shadow of a regular phantom black hole as photons couple to the Weyl tensor

Double shadow of a regular phantom black hole as photons couple to the Weyl tensor

Testing gravity of a regular and slowly rotating phantom black hole by quasi-periodic oscillations

Gravitational lensing by phantom black holes

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